1) Abarth 500 (99 kW factory upgradeable to 118 kW)
2) Mini Cooper S (128kW)
3) Opel Corsa OPC (143 kW)
4) Ford Fiesta ST (136 kW)
All these cars shine in a certain area imho, the 500 is tiny yet powerful, same for the Mini (bit dated now but still good), the Corsa is very powerful and aggressive (I love torque steer for some reason, it makes it so much fun to drive), Fiesta is a awesome drive. Everyday driver the Fiesta, city the 500, Corsa for a weekend toy and the Mini sadly being a bit dated would be my last choice but it's still good. Honda Jazz doesn't match up to these imho but if it wasn't so ugly and they put a nice 1600 high-rev V-Tec motor in there I'll rethink my opinion.
VW polo doesn't really shine in any one category, it's the all-rounder, not really my type of car, I like car with some personality.